Add back missing Solution Items.
Add back missing Solution Items.

fsprojects/FSharpx.Extras,fsprojects/FSharpx.Extras,bryanedds/FSharpx.Extras,bryanedds/FSharpx.Extras,sideeffffect/FSharpx.Extras,sideeffffect/FSharpx.Extras,bryanedds/FSharpx.Extras